Mainframe Performance AdministratorDCV Technologies • Bracknell, England, United Kingdom

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Mainframe Performance Administrator

DCV Technologies

Bracknell, England, United Kingdom

Bracknell, England, United Kingdom

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Mainframe Performance & Capacity Administrator – z/OS | Contract | Office Based We are seeking an experienced Mainframe Performance & Capacity Administrator to support a large-scale IBM z/OS enterprise environment. This is a high-impact contract role focused on performance tuning, capacity planning, and cost optimisation across mission-critical mainframe systems. You will lead performance and capacity initiatives across complex z/OS, SYSPLEX and PR/SM environments, ensuring optimal utilisation of CPU, memory, DASD and WLM-managed workloads. This role requires deep expertise in RMF, SMF, MXG, MICS, SAS and TMON, along with strong knowledge of MIPS, MSU, 4HRA and soft capping models. Key Responsibilities * Analyse RMF and SMF records to diagnose performance issues * Tune WLM service definitions and optimise workload placement * Lead capacity forecasting and modelling across enterprise estates * Support SCRT reporting and MSU cost management * Optimise zIIP, GP processors and PR/SM configurations * Provide 24/7 on-call support for critical systems Essential Skills * IBM z/OS performance and capacity management * Strong experience with SMF, RMF, MXG, MICS, SAS or TMON * Expertise in WLM tuning and SYSPLEX environments * Proven capacity planning and performance optimisation experience * Deep understanding of MIPS, MSU, 4HRA and soft capping Experience within large enterprise, banking, insurance or regulated environments is highly desirable. This is a senior-level contract opportunity offering strong visibility and ownership within a complex mainframe estate. Apply now if you are a specialist in z/OS performance tuning and capacity management looking for your next contract challenge

Bracknell, England, United Kingdom

Sprachkenntnisse

English

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